No, it is not possible to give restriction for keeping records in the blockchain approach. We can put any type of data on a blockchain such as Bank records, health records, images, Facebook messages, etc.

Some of the common types of records which can be kept in the blockchain are:

Records of medical transactions
Transaction processing
Identity management
Events related to organizations,
Management activities
Documentation

Blockchain is a distributed ledger technology that can be used to record various types of information and transactions. The primary purpose of a blockchain is to maintain a secure, transparent, and tamper-resistant record of data. Here are some common types of records that can be kept in a blockchain:

Financial Transactions: Blockchain is widely known for its use in recording financial transactions, such as cryptocurrency transactions (e.g., Bitcoin). It provides a decentralized and transparent ledger for tracking the flow of funds.
Smart Contracts: Smart contracts are self-executing contracts with the terms of the agreement between buyer and seller directly written into code. They can be deployed on a blockchain to automate and enforce contractual agreements.
Supply Chain Data: Blockchain can be used to trace and verify the authenticity of products in a supply chain. This helps in reducing fraud and ensuring the integrity of the supply chain.
Identity Management: Blockchain can be employed for secure and decentralized identity management systems. This enables individuals to have control over their personal information and selectively share it with others.
Medical Records: Storing medical records on a blockchain ensures secure and interoperable access to patient data, while maintaining privacy and integrity.
Property and Land Titles: Blockchain can be used to record and verify property and land titles, reducing fraud and providing a transparent history of ownership.
Intellectual Property: Blockchain can assist in managing and protecting intellectual property rights by providing a secure and immutable record of creation and ownership.

While blockchain is versatile, there are some considerations and potential restrictions:

Size Limitations: Each block in a blockchain has a maximum size, which can limit the amount of data that can be stored in a single block.
Scalability: The scalability of blockchain networks can be a challenge, especially for public blockchains, when it comes to handling a large number of transactions in a short period.
Privacy Concerns: While blockchain provides transparency, there may be concerns regarding the privacy of certain types of data. Different blockchain platforms implement privacy features to varying extents.
Regulatory Compliance: Depending on the use case and jurisdiction, there may be regulatory considerations that need to be addressed when using blockchain for certain types of records.

It’s essential to carefully design and choose the appropriate blockchain platform and consensus mechanism based on the specific requirements of the use case.